Mon, 25 Jan 2010 18:03:29 -0500
6919980: G1: remove +UseG1GC from under experimental options (second attempt)
Summary: Trying this again, as the original change was lost.
Reviewed-by: ysr, jmasa
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // Data structure for holding monitors for one activation during |
duke@435 | 26 | // deoptimization. |
duke@435 | 27 | |
duke@435 | 28 | class MonitorChunk: public CHeapObj { |
duke@435 | 29 | private: |
duke@435 | 30 | int _number_of_monitors; |
duke@435 | 31 | BasicObjectLock* _monitors; |
duke@435 | 32 | BasicObjectLock* monitors() const { return _monitors; } |
duke@435 | 33 | MonitorChunk* _next; |
duke@435 | 34 | public: |
duke@435 | 35 | // Constructor |
duke@435 | 36 | MonitorChunk(int number_on_monitors); |
duke@435 | 37 | ~MonitorChunk(); |
duke@435 | 38 | |
duke@435 | 39 | // link operations |
duke@435 | 40 | MonitorChunk* next() const { return _next; } |
duke@435 | 41 | void set_next(MonitorChunk* next) { _next = next; } |
duke@435 | 42 | |
duke@435 | 43 | // Tells whether the monitor chunk is linked into the JavaThread |
duke@435 | 44 | bool is_linked() const { return next() != NULL; } |
duke@435 | 45 | |
duke@435 | 46 | // Returns the number of monitors |
duke@435 | 47 | int number_of_monitors() const { return _number_of_monitors; } |
duke@435 | 48 | |
duke@435 | 49 | // Returns the index'th monitor |
duke@435 | 50 | BasicObjectLock* at(int index) { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; } |
duke@435 | 51 | |
duke@435 | 52 | |
duke@435 | 53 | // Memory management |
duke@435 | 54 | void oops_do(OopClosure* f); |
duke@435 | 55 | |
duke@435 | 56 | // Tells whether the addr point into the monitors. |
duke@435 | 57 | bool contains(void* addr) const { return (addr >= (void*) monitors()) && (addr < (void*) (monitors() + number_of_monitors())); } |
duke@435 | 58 | }; |